Harmful substance separation device for tail-end flue gas of sintering machine

Abstract

The invention discloses a noxious substance separation device for sintering machine tail end flue gas, and relates to the technical field of flue gas treatment.The noxious substance separation device comprises a base, a filter box, a desulfurization box and a reduction box are fixedly installed at the top of the base, a flue gas inlet pipeline is arranged on one side of the filter box, and an insertion groove is formed in the top of the filter box; sliding grooves are vertically formed in the front side and the rear side of the interior of the filter box, an ash falling groove is formed in the bottom of the filter box, the bottom of the ash falling groove communicates with a dust collecting box, a first box door is arranged on the front face of the dust collecting box, and a first connecting pipe is arranged on the side, away from the smoke inlet pipeline, of the filter box and communicates with the interior of the desulfurization box; a second connecting pipe is arranged on the side, away from the first connecting pipe, of the desulfurization box. When the sintering machine tail end flue gas is subjected to harmful substance separation treatment, the filtering mechanism is not prone to being blocked, automatic cleaning can be achieved, manual frequent cleaning is not needed, time and labor are saved, efficiency is high, and the overall separation treatment effect on harmful substances in the flue gas is good.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas treatment, and particularly to a harmful substance separation device for the flue gas at the tail end of a sintering machine. Background Art

[0002] When a sintering machine is in use, it will generate a large amount of flue gas, which contains some substances harmful to the air, such as acidic sulfur-containing substances. If directly discharged into the air, it will cause certain harm to the environment. Therefore, a specific device is needed to purify the flue gas generated by the sintering machine, as follows.

[0003] After retrieval, a patent with the authorization announcement number CN218047273U discloses a sintering machine flue gas treatment device, which relates to the technical field of flue gas treatment. It includes a flue gas treatment cylinder. An air inlet is opened at the top of the flue gas treatment cylinder, and an air inlet pipe is installed at the top of the air inlet. A square groove communicating with the flue gas treatment cylinder is opened on one side of the flue gas treatment cylinder, and the width of the square groove is adapted to the cross-sectional width of the internal passage of the flue gas treatment cylinder. A sliding groove is opened on the inner wall of the square groove, and a collection frame is slidably connected inside the square groove. Limiting strips are installed on both side surfaces of the collection frame, and the limiting strips are slidably connected inside the sliding groove. In this utility model, a high-temperature resistant fan is used to form an air flow from top to bottom inside the flue gas treatment cylinder, driving the flue gas to pass through the ash filtering net on the collection frame, filtering the dust contained in the flue gas in the collection frame, facilitating centralized treatment, reducing the difficulty of flue gas treatment at the same time, and effectively avoiding the problem that the dust in the flue gas is easily attached to the inner wall of the flue gas treatment cylinder to form ash scale.

[0004] However, the existing sintering machine flue gas treatment device still has the following aspects that can be optimized. When it is working, although it can intercept, filter and separate particulate impurities in the flue gas, after working for a period of time, its filtering mechanism is prone to clogging. Therefore, it is necessary to frequently disassemble and clean the filtering mechanism, which is time-consuming and laborious, with low efficiency, and also requires frequent suspension of flue gas treatment work, and its usability is poor, and the structure needs to be improved. Summary of the Invention

[0005] The present invention discloses a harmful substance separation device for the flue gas at the tail end of a sintering machine, which solves the above problems.

[0006] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0007] A harmful substance separation device for the flue gas at the tail end of a sintering machine according to the present invention includes a base. A filter box, a desulfurization box, and a reduction box are fixedly installed on the top of the base. A smoke inlet pipe is provided on one side of the filter box. An insertion groove is formed on the top of the filter box. Vertical sliding grooves are formed on the front and rear sides inside the filter box. An ash discharge groove is formed on the bottom of the filter box. The bottom of the ash discharge groove is connected and communicated with a dust collection box. A first box door is provided on the front of the dust collection box. A first connecting pipe is provided on the side of the filter box away from the smoke inlet pipe. The first connecting pipe is communicated with the inside of the desulfurization box. A second connecting pipe is provided on the side of the desulfurization box away from the first connecting pipe. The second connecting pipe is connected and communicated with the top of the reduction box, and the bottom end of the second connecting pipe extends to the inner bottom of the reduction box. A smoke exhaust pipe is provided on the top of the reduction box. Drain pipes with valves are provided on the fronts of the desulfurization box and the reduction box. A first liquid inlet pipe with a cover is provided on the top of the reduction box;

[0008] A self-cleaning filter mechanism, the self-cleaning filter mechanism includes a filter mesh plate, a lead screw, and a first motor. The top of the filter mesh plate is fixedly connected with a top plate. The top of the top plate is fixedly connected with a handle. The filter mesh plate passes through the insertion groove and extends into the inside of the filter box. A plurality of connecting ears and bolts are provided on both sides of the top plate. The bolts are screwed to the top of the filter box. The bottom end of the lead screw is rotatably connected to the inner bottom surface of the filter box. The top end of the lead screw movably penetrates through the top of the filter box. The first motor is fixedly installed on the top of the filter box through a mounting frame, and the output end of the first motor is connected to the top end of the lead screw. A slider is screwed on the outside of the lead screw. One side of the slider is fixedly connected with a cleaning block. The front and rear sides of the cleaning block are respectively slidably connected to the two sliding grooves. A brush part is provided on one side of the cleaning block. The brush part contacts the filter mesh plate. The lead screw and the filter mesh plate are respectively located on both sides of the ash discharge groove, and the lead screw is close to the smoke inlet pipe;

[0009] An auxiliary cleaning mechanism, the auxiliary cleaning mechanism is located inside and outside the filter box;

[0010] A desulfurization mechanism, the desulfurization mechanism is located on the top and inside of the desulfurization box;

[0011] An adsorption and purification mechanism, the adsorption and purification mechanism is connected to the smoke exhaust pipe.

[0012] Further, the ends of the first connecting pipe and the second connecting pipe located inside the desulfurization box are both inclined downward.

[0013] Further, a first sealing cushion layer is fixedly attached to the inner bottom surface of the filter box. The top of the first sealing cushion layer abuts against the bottom of the filter mesh plate.

[0014] Further, a second sealing cushion layer is fixedly attached to the bottom of the top plate, and the second sealing cushion layer is in abutting contact with the top of the filter box.

[0015] Further, the auxiliary cleaning mechanism includes a rotating shaft and a second motor. There are two rotating shafts, and both rotating shafts penetrate through one side of the filter box and are rotatably connected to the filter box. At one end of both rotating shafts located inside the filter box, connection blocks are fixedly connected. At the top and bottom of the connection block, cleaning rods are fixedly connected. The cleaning rods are located above the ash dropping groove and are matched with the position of the brush hair part. The second motor is fixedly installed on the outer side of the filter box through a mounting member, and the output end of the second motor is connected to the shaft end of one of the rotating shafts. The two rotating shafts are connected by a pulley and a transmission belt.

[0016] Further, the desulfurization mechanism includes a liquid storage tank, a pump body, and a liquid delivery pipe. The liquid storage tank is fixedly installed on the top of the desulfurization box. The input end of the pump body is connected to communicate with the inside of the liquid storage tank. The output end of the pump body is connected to the liquid delivery pipe. The liquid delivery pipe penetrates through the top of the desulfurization box and extends into the inside of the desulfurization box. The liquid delivery pipe is a U-shaped pipe group. A plurality of branch pipes are connected to the bottom of the liquid delivery pipe. Atomizing nozzles are provided at the bottom of the branch pipes, and all the atomizing nozzles are higher than the first connecting pipe and the second connecting pipe. A second liquid inlet pipe with a cover is provided on the top of the liquid storage tank.

[0017] Further, the adsorption and purification mechanism includes a purification box. One side of the purification box is connected to the exhaust pipe, and a discharge pipe is provided on the other side of the purification box. An activated carbon filter plate is movably clamped inside the purification box. A second box door is provided on one side of the purification box.

[0018] Further, when the first box door is closed, it is in a sealed connection with the dust collection box, and when the second box door is closed, it is also in a sealed connection with the purification box.

[0019] The present invention has the following beneficial effects compared with the prior art:

[0020] 1. This technical solution is provided with a filtering box, a dust collecting box and a self-cleaning filtering mechanism. When working, the smoke inlet pipe can be connected to the external smoke delivery pipe to convey the tail-end flue gas of the sintering machine to the filtering box. After the flue gas passes through the filter mesh plate, the particulate impurities in the flue gas can be intercepted by the filter mesh plate, preventing the particulate matter from being subsequently discharged into the air and causing pollution. During this process, the first motor works in cooperation with the lead screw and the slider to drive the cleaning block and the brush part to move up and down reciprocally, continuously performing automatic cleaning on the filter mesh plate, effectively preventing blockage at the filter mesh plate and affecting the passage of the flue gas and subsequent treatment. There is no need for manual frequent disassembly and cleaning of the filter mesh plate, which saves time and effort, and it is also not necessary to pause the flue gas treatment work to clean the filtering mechanism. Therefore, the usability of the device is greatly improved;

[0021] 2. This technical solution is provided with an auxiliary cleaning mechanism. When not working, the first motor can be started. The first motor works in cooperation with the lead screw and the slider to drive the cleaning block and the brush part to move down to the bottommost position. Then, the first motor is locked and turned off, and the second motor works to drive the two rotating shafts to rotate, thereby driving the two groups of cleaning rods to rotate. The cleaning rods rotate to beat, stir and vibrate the brush part, shaking off the particulate matter and impurities attached to the brush part, and cleaning the brush part to ensure its cleanliness, so that it can better clean the filter mesh plate;

[0022] 3. This technical solution is provided with a desulfurization box and a desulfurization mechanism. When the flue gas enters the desulfurization box after filtration, the pump body works to convey the alkaline solution in the liquid storage tank to the liquid delivery pipe. Then, the liquid delivery pipe cooperates with multiple branch pipes and atomizing nozzles to evenly spray it into the desulfurization box, and perform an acid-base neutralization reaction with the flue gas flowing through the inside of the desulfurization box to remove sulfur dioxide in the flue gas and improve the separation and treatment effect of harmful substances in the flue gas;

[0023] 4. This technical solution is provided with an adsorption and purification mechanism. After the flue gas has undergone filtration, acid-base neutralization and nitrogen oxide catalytic reduction treatment, the activated carbon filter plate in the purification box can also adsorb and purify mercury and volatile organic compounds in the flue gas, further improving the separation and treatment effect of harmful substances in the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1Schematic diagram of the overall three-dimensional structure of the present invention;

[0026] Figure 2 Schematic diagram of the structure of another perspective of the present invention;

[0027] Figure 3 Schematic diagram of the installation structure of the dust collection box of the present invention;

[0028] Figure 4 Schematic diagram of the internal sectional structure of the filter box of the present invention;

[0029] Figure 5 Schematic diagram of the exploded installation structure of the cleaning block of the present invention;

[0030] Figure 6 Schematic diagram of the exploded installation structure of the liquid delivery pipe of the present invention;

[0031] Figure 7 Schematic diagram of the bottom structure of the liquid delivery pipe of the present invention;

[0032] Figure 8 Schematic diagram of the internal sectional structure of the reduction box of the present invention;

[0033] Figure 9 Schematic diagram of the clamping installation structure of the activated carbon filter plate of the present invention.

[0034] In the figure: 1, base; 2, filter box; 3, desulfurization box; 4, reduction box; 5, flue gas inlet pipe; 6, insertion groove; 7, sliding groove; 8, ash dropping groove; 9, dust collection box; 10, first box door; 11, first connecting pipe; 12, second connecting pipe; 13, exhaust pipe; 14, drain pipe; 15, first liquid inlet pipe; 16, self-cleaning filter mechanism; 1601, filter mesh plate; 1602, lead screw; 1603, first motor; 1604, top plate; 1605, handle; 1606, bolt; 1607, slider; 1608, cleaning block; 1609, brush part; 1610, first sealing cushion layer; 1611, second sealing cushion layer; 17, auxiliary cleaning mechanism; 1701, rotating shaft; 1702, second motor; 1703, connecting block; 1704, cleaning rod; 18, desulfurization mechanism; 1801, liquid storage tank; 1802, pump body; 1803, liquid delivery pipe; 1804, branch pipe; 1805, atomizing nozzle; 1806, second liquid inlet pipe; 19, adsorption and purification mechanism; 1901, purification box; 1902, discharge pipe; 1903, activated carbon filter plate; 1904, second box door. Detailed implementation manners

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] In the description of the present invention, it should be understood that terms such as "surface", "side", "gap", "peripheral side", etc. indicating orientation or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. Specific Embodiment 1:

[0038] Refer to Figures 1 - 5 , a harmful substance separation device for the flue gas at the tail end of a sintering machine, comprising a base 1. A filter box 2, a desulfurization box 3, and a reduction box 4 are fixedly installed on the top of the base 1. A smoke inlet pipe 5 is provided on one side of the filter box 2. An insertion slot 6 is opened at the top of the filter box 2. Vertical sliding grooves 7 are opened on both the front and rear sides inside the filter box 2. An ash dropping slot 8 is opened at the bottom of the filter box 2. The bottom of the ash dropping slot 8 is communicated with a dust collection box 9. A first box door 10 is provided on the front of the dust collection box 9. A first connecting pipe 11 is provided on the side of the filter box 2 away from the smoke inlet pipe 5. The first connecting pipe 11 is communicated with the inside of the desulfurization box 3. A second connecting pipe 12 is provided on the side of the desulfurization box 3 away from the first connecting pipe 11. The second connecting pipe 12 is communicated with the top of the reduction box 4, and the bottom end of the second connecting pipe 12 extends to the inner bottom of the reduction box 4. A smoke exhaust pipe 13 is provided on the top of the reduction box 4. Drain pipes 14 with valves are provided on the fronts of both the desulfurization box 3 and the reduction box 4. A first liquid inlet pipe 15 with a cover is provided on the top of the reduction box 4;

[0039] Self-cleaning filtration mechanism 16, the self-cleaning filtration mechanism 16 includes a filter mesh plate 1601, a lead screw 1602 and a first motor 1603. The top of the filter mesh plate 1601 is fixedly connected to a top plate 1604. The top of the top plate 1604 is fixedly connected to a handle 1605. The filter mesh plate 1601 passes through the insertion slot 6 and extends into the interior of the filter box 2. Both sides of the top plate 1604 are provided with a plurality of connecting ears and bolts 1606. The bolts 1606 are screwed to the top of the filter box 2. The bottom end of the lead screw 1602 is rotatably connected to the inner bottom surface of the filter box 2. The top end of the lead screw 1602 movably penetrates the top of the filter box 2. The first motor 1603 is fixedly installed on the top of the filter box 2 through a mounting bracket, and the output end of the first motor 1603 is connected to the top end of the lead screw 1602. A slider 1607 is screwed to the outside of the lead screw 1602. One side of the slider 1607 is fixedly connected to a cleaning block 1608. The front and rear sides of the cleaning block 1608 are respectively slidably connected to two chutes 7. One side of the cleaning block 1608 is provided with a brush portion 1609. The brush portion 1609 contacts the filter mesh plate 1601. The lead screw 1602 and the filter mesh plate 1601 are respectively located on both sides of the ash-dropping groove 8, and the lead screw 1602 is close to the smoke inlet pipe 5; an auxiliary cleaning mechanism 17, the auxiliary cleaning mechanism 17 is located inside and outside the filter box 2; a desulfurization mechanism 18, the desulfurization mechanism 18 is located on the top and inside of the desulfurization box 3; an adsorption and purification mechanism 19, the adsorption and purification mechanism 19 is connected to the exhaust pipe 13;

[0040] One ends of the first connecting pipe 11 and the second connecting pipe 12 located inside the desulfurization box 3 are both inclined downward; a first sealing cushion layer 1610 is fixedly attached to the inner bottom surface of the filter box 2. The top of the first sealing cushion layer 1610 abuts against the bottom of the filter mesh plate 1601; a second sealing cushion layer 1611 is fixedly attached to the bottom of the top plate 1604. The second sealing cushion layer 1611 abuts against the top of the filter box 2.

[0041] In the specific implementation process, when working, the smoke inlet pipe 5 can be connected to the external smoke delivery pipe to transport the tail end smoke of the sintering machine to the filter box 2. After the smoke passes through the filter screen 1601, the filter screen 1601 can intercept the particulate impurities in the smoke to prevent the particulate matter from being subsequently discharged into the air and causing pollution. In this process, the first motor 1603 can be used to drive the screw rod 1602 to rotate. The rotation of the screw rod 1602 can cooperate with the slider 1607 to drive the cleaning block 1608 slidably connected to the inside of the filter box 2 to move back and forth up and down, thereby driving the brush part 1609 to move back and forth up and down. Since the brush part 1609 is connected to the filter screen 1601, so the filter plate 1601 can be continuously and automatically cleaned, effectively avoiding the blockage of the filter plate 1601 and affecting the passage of smoke and subsequent treatment, without the need for manual frequent disassembly of the filter plate 1601 for cleaning, saving time and effort, and greatly improving the convenience of use of the device, and the particulate matter and impurities swept down will fall into the dust box 9 through the drop chute for centralized collection, which is convenient for subsequent regular centralized cleaning, and according to actual needs, multiple bolts 1606 can be loosened, and the filter plate 1601 can be pulled out through the handle 1605 and the top plate 1604 for inspection, maintenance or cleaning and replacement;

[0042] The ends of the first connecting pipe 11 and the second connecting pipe 12 located inside the desulfurization box 3 are both tilted downwards to prevent the alkaline solution from entering the filter box 2 and the reduction box 4 through the first connecting pipe 11 and the second connecting pipe 12 during the subsequent flue gas shedding operation;

[0043] The first sealing gasket layer 1610 can improve the sealing between the bottom of the filter screen 1601 and the bottom surface of the filter box 2, ensuring that the smoke can pass through the filter screen 1601;

[0044] The second sealing gasket layer 1611 can improve the sealing between the top plate 1604 and the insertion groove 6 to prevent smoke leakage;

[0045] It is understandable that the first sealing gasket layer 1610 and the second sealing gasket layer 1611 are both made of high-temperature resistant sealing rubber material. Specific embodiment 2:

[0047] Reference Figure 4 and Figure 5, in a preferred embodiment, the auxiliary cleaning mechanism 17 includes a rotating shaft 1701 and a second motor 1702. There are two rotating shafts 1701, both of which penetrate through one side of the filter box 2 and are rotatably connected to the filter box 2. At one end of the two rotating shafts 1701 located inside the filter box 2, connection blocks 1703 are fixedly connected. At the top and bottom of the connection block 1703, cleaning rods 1704 are fixedly connected. The cleaning rods 1704 are located at the top of the ash dropping groove 8 and are matched with the position of the brush part 1609. The second motor 1702 is fixedly installed on the outer side of the filter box 2 through a mounting member, and the output end of the second motor 1702 is connected to the shaft end of one of the rotating shafts 1701. The two rotating shafts 1701 are driven by a pulley and a transmission belt.

[0048] In the specific implementation process, when not working, the first motor 1603 can be started. The first motor 1603 works in cooperation with the lead screw 1602 and the slider 1607 to drive the cleaning block 1608 and the brush part 1609 to move down to the bottom. Then, the first motor 1603 is locked and turned off. The second motor of 1702 works, and in cooperation with the pulley and the transmission belt, synchronously drives the two rotating shafts 1701 to rotate, thereby driving the two groups of cleaning rods 1704 to rotate. The cleaning rods 1704 rotate to knock, stir and vibrate the brush part 1609, shake off the particles and impurities attached to the brush part 1609, and clean the brush part 1609 to ensure the cleanliness of the brush part 1609, so that it can better clean the filter screen plate 1601. Specific Embodiment 3:

[0050] Refer to Figure 6 and Figure 7 , in a preferred embodiment, the desulfurization mechanism 18 includes a liquid storage tank 1801, a pump body 1802 and a liquid delivery pipe 1803. The liquid storage tank 1801 is fixedly installed on the top of the desulfurization tank 3. The input end of the pump body 1802 is connected to communicate with the inside of the liquid storage tank 1801. The output end of the pump body 1802 is connected to the liquid delivery pipe 1803. The liquid delivery pipe 1803 penetrates through the top of the desulfurization tank 3 and extends into the inside of the desulfurization tank 3. The liquid delivery pipe 1803 is a U-shaped pipe group. A plurality of branch pipes 1804 are connected to the bottom of the liquid delivery pipe 1803. Atomizing nozzles 1805 are provided at the bottom of the branch pipes 1804, and a plurality of atomizing nozzles 1805 are all higher than the first connecting pipe 11 and the second connecting pipe 12. A second liquid inlet pipe 1806 with a cover is provided on the top of the liquid storage tank 1801.

[0051] In the specific implementation process, when the flue gas enters the desulfurization tank 3 after filtration, the alkaline solution previously added to the liquid storage tank 1801 can be transported into the liquid delivery pipe 1803 through the operation of the pump body 1802, and then the liquid delivery pipe 1803 cooperates with a plurality of branch pipes 1804 and atomizing nozzles 1805 to be evenly sprayed into the desulfurization tank 3, and perform an acid-base neutralization reaction with the flue gas flowing through the inside of the desulfurization tank 3 to remove sulfur dioxide in the flue gas and improve the separation and treatment effect of harmful substances in the flue gas. Specific Embodiment 4:

[0053] Referring to Figure 8 and Figure 9 In a preferred implementation manner, the adsorption and purification mechanism 19 includes a purification tank 1901. One side of the purification tank 1901 is connected to the exhaust pipe 13, and the other side of the purification tank 1901 is provided with a discharge pipe 1902. An activated carbon filter plate 1903 is movably clamped inside the purification tank 1901, and a second box door 1904 is provided on one side of the purification tank 1901; when the first box door 10 is closed, it is hermetically connected to the dust collection box 9, and when the second box door 1904 is closed, it is also hermetically connected to the purification tank 1901.

[0054] In the specific implementation process, when the flue gas passes through the inside of the purification tank 1901, the activated carbon filter plate 1903 in the purification tank 1901 can adsorb and purify mercury and volatile organic compounds in the flue gas, further improve the separation and treatment effect of harmful substances in the flue gas, and finally, the flue gas is discharged through the discharge pipe 1902 and the external pipeline.

[0055] Working principle: During operation, the smoke inlet pipe 5 can be connected to the external smoke delivery pipe to convey the flue gas at the tail end of the sintering machine to the filter box 2. After the flue gas passes through the filter mesh plate 1601, the filter mesh plate 1601 can intercept the particulate impurities in the flue gas, preventing the particulates from being subsequently discharged into the air and causing pollution. During this process, the operation of the first motor 1603 can drive the screw rod 1602 to rotate. The rotation of the screw rod 1602 can cooperate with the slider 1607 to drive the cleaning block 1608 slidingly connected inside the filter box 2 to move up and down reciprocally, thereby driving the brush part 1609 to move up and down reciprocally. Since the brush part 1609 contacts the filter mesh plate 1601, the filter mesh plate 1601 can be continuously and automatically cleaned, effectively preventing blockage at the filter mesh plate 1601, which may affect the passage of the flue gas and subsequent processing. There is no need for manual frequent disassembly of the filter mesh plate 1601 for cleaning, which saves time and effort and greatly improves the usability of the device. The particulate impurities swept down will fall into the dust collection box 9 through the material dropping groove for centralized collection, facilitating subsequent regular centralized cleaning. And according to actual needs, multiple bolts 1606 can be loosened, and the filter mesh plate 1601 can be pulled out through the handle 1605 and the top plate 1604 for maintenance, repair, cleaning, or replacement;

[0056] When not in operation, the first motor 1603 can be started. The operation of the first motor 1603 cooperates with the screw rod 1602 and the slider 1607 to drive the cleaning block 1608 and the brush part 1609 to move down to the bottommost position. Then the first motor 1603 is locked and turned off. The second motor 1702 operates, cooperating with the pulley and the transmission belt to synchronously drive the rotation of the two rotating shafts 1701, thereby driving the rotation of the two groups of cleaning rods 1704. The rotation of the cleaning rods 1704 knocks, stirs, and vibrates the brush part 1609 to shake off the particulates and impurities attached to the brush part 1609, cleaning the brush part 1609 to ensure its cleanliness, enabling it to better clean the filter mesh plate 1601. Moreover, the shaken-off particulate impurities will also naturally fall into the dust collection box 9 through the material dropping groove for centralized collection, facilitating subsequent centralized cleaning;

[0057] When the flue gas enters the desulfurization box 3 after filtration, the operation of the pump body 1802 can convey the alkaline solution previously added to the liquid storage tank 1801 into the liquid delivery pipe 1803. Then, the liquid delivery pipe 1803 cooperates with multiple branch pipes 1804 and atomizing nozzles 1805 to evenly spray it into the desulfurization box 3, where it undergoes an acid-base neutralization reaction with the flue gas flowing through the inside of the desulfurization box 3 to remove sulfur dioxide in the flue gas and improve the separation and treatment effect of harmful substances in the flue gas;

[0058] And during operation, ammonia water and a catalyst can be added to the reduction tank 4. When the flue gas enters the reduction tank 4, it will directly enter the ammonia water. With the acceleration of the ammonia water in cooperation with the catalyst, it reacts with the nitrogen oxides in the flue gas, and to a certain extent, a small amount of nitrogen oxides can be reduced to nitrogen and water, further improving the separation and treatment effect of harmful substances in the flue gas. Subsequently, the flue gas enters the interior of the purification tank 1901 through the exhaust pipe 13;

[0059] It can be understood that the reduction tank 4 can be replaced by an absorption tower containing ammonia water and a catalyst, and the nitrogen oxides undergo a reduction reaction with ammonia in the liquid phase. This is an application of the prior art, so it will not be elaborated here in detail;

[0060] When the flue gas passes through the interior of the purification tank 1901, the activated carbon filter plate 1903 in the purification tank 1901 can adsorb and purify mercury and volatile organic compounds in the flue gas, further improving the separation and treatment effect of harmful substances in the flue gas. Finally, the flue gas is discharged through the discharge pipe 1902 and the external pipeline.

[0061] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A harmful substance separation device for the flue gas at the tail end of a sintering machine, comprising a base (1), characterized in that: At the top of the base (1), a filter box (2), a desulfurization box (3), and a reduction box (4) are fixedly installed. On one side of the filter box (2), a flue gas inlet pipe (5) is provided. At the top of the filter box (2), an insertion slot (6) is opened. On the front and rear sides inside the filter box (2), vertical sliding grooves (7) are opened. At the bottom of the filter box (2), an ash dropping slot (8) is opened. At the bottom of the ash dropping slot (8), a dust collection box (9) is connected in communication. On the front of the dust collection box (9), a first box door (10) is provided. On the side of the filter box (2) away from the flue gas inlet pipe (5), a first connecting pipe (11) is provided. The first connecting pipe (11) is in communication with the inside of the desulfurization box (3). On the side of the desulfurization box (3) away from the first connecting pipe (11), a second connecting pipe (12) is provided. The second connecting pipe (12) is connected in communication with the top of the reduction box (4), and the bottom end of the second connecting pipe (12) extends to the inner bottom of the reduction box (4). On the top of the reduction box (4), a smoke exhaust pipe (13) is provided. On the front of both the desulfurization box (3) and the reduction box (4), a drain pipe (14) with a valve is provided. On the top of the reduction box (4), a first liquid inlet pipe (15) with a cover is provided; A self-cleaning filtering mechanism (16), the self-cleaning filtering mechanism (16) includes a filter mesh plate (1601), a lead screw (1602), and a first motor (1603). At the top of the filter mesh plate (1601), a top plate (1604) is fixedly connected. At the top of the top plate (1604), a handle (1605) is fixedly connected. The filter mesh plate (1601) passes through the insertion slot (6) and extends into the interior of the filter box (2). On both sides of the top plate (1604), a plurality of connecting ears and bolts (1606) are provided. The bolts (1606) are screwed to the top of the filter box (2). The bottom end of the lead screw (1602) is rotatably connected to the inner bottom surface of the filter box (2). The top end of the lead screw (1602) movably passes through the top of the filter box (2). The first motor (1603) is fixedly installed on the top of the filter box (2) through a mounting frame, and the output end of the first motor (1603) is connected to the top end of the lead screw (1602). A slider (1607) is screwed on the outside of the lead screw (1602). On one side of the slider (1607), a cleaning block (1608) is fixedly connected. The front and rear sides of the cleaning block (1608) are respectively slidably connected to the two sliding grooves (7). On one side of the cleaning block (1608), a brush part (1609) is provided. The brush part (1609) contacts the filter mesh plate (1601). The lead screw (1602) and the filter mesh plate (1601) are respectively located on both sides of the ash dropping slot (8), and the lead screw (1602) is close to the flue gas inlet pipe (5); An auxiliary cleaning mechanism (17), the auxiliary cleaning mechanism (17) is located inside and outside the filter box (2); A desulfurization mechanism (18), the desulfurization mechanism (18) is located on the top and inside of the desulfurization box (3); An adsorption purification mechanism (19) is connected to the smoke exhaust pipe (13).

2. The harmful substance separation device for the sintering machine tail-end flue gas according to claim 1, wherein: One end of the first connecting pipe (11) and the second connecting pipe (12) located inside the desulfurization box (3) are both inclined downward.

3. The harmful substance separation device for the sintering machine tail-end flue gas according to claim 1, wherein: A first sealing gasket layer (1610) is fixedly attached to the inner bottom surface of the filter box (2), and the top of the first sealing gasket layer (1610) abuts against the bottom of the filter screen plate (1601).

4. A harmful substance separation device for sintering machine tail-end flue gas according to claim 1, characterized in that: A second sealing gasket layer (1611) is fixedly attached to the bottom of the top plate (1604), and the second sealing gasket layer (1611) is attached to and abuts against the top of the filter box (2).

5. The harmful substance separation device for the flue gas at the tail end of a sintering machine according to claim 1, characterized in that: The auxiliary cleaning mechanism (17) includes a rotating shaft (1701) and a second motor (1702), wherein two rotating shafts (1701) are provided, and both rotating shafts (1701) pass through one side of the filter box (2) and are rotatably connected to the filter box (2), and one end of the two rotating shafts (1701) located inside the filter box (2) is fixedly connected to a connecting block (1703), and the top and bottom of the connecting block (1703) are fixedly connected to a cleaning rod (1704), and the cleaning rod (1704) is located at the top of the dust trough (8) and matches the position of the brush part (1609), and the second motor (1702) is fixedly installed on the outer side of the filter box (2) through a mounting member, and the output end of the second motor (1702) is connected to the shaft end of one of the rotating shafts (1701), and the two rotating shafts (1701) are connected by a pulley and a transmission belt.

6. The harmful substance separation device for the flue gas at the tail end of a sintering machine according to claim 1, wherein: The desulfurization mechanism (18) comprises a liquid storage tank (1801), a pump body (1802) and a liquid delivery pipe (1803). The liquid storage tank (1801) is fixedly mounted on the top of the desulfurization tank (3). The input end of the pump body (1802) is connected to the interior of the liquid storage tank (1801). The output end of the pump body (1802) is connected to the liquid delivery pipe (1803). The liquid delivery pipe (1803) passes through the top of the desulfurization tank (3) and extends to the desulfurization tank (3). Inside the sulfur box (3), the liquid delivery pipe (1803) is a U-shaped pipe group. The bottom of the liquid delivery pipe (1803) is connected to multiple branch pipes (1804). The bottom of the branch pipe (1804) is provided with an atomizing nozzle (1805), and the multiple atomizing nozzles (1805) are all higher than the first connecting pipe (11) and the second connecting pipe (12). The top of the liquid storage tank (1801) is provided with a second liquid inlet pipe (1806) with a cover.

7. The harmful substance separation device for the flue gas at the tail end of a sintering machine according to claim 1, wherein: The adsorption purification mechanism (19) includes a purification box (1901), one side of the purification box (1901) is connected to the smoke exhaust pipe (13), the other side of the purification box (1901) is provided with a discharge pipe (1902), the internal movable card of the purification box (1901) is equipped with an activated carbon filter plate (1903), and one side of the purification box (1901) is provided with a second box door (1904).

8. The harmful substance separation device for the sintering machine tail gas according to claim 7, characterized in that: When the first cabinet door (10) is closed, it is in a sealed connection with the dust collection cabinet (9), and when the second cabinet door (1904) is closed, it is also in a sealed connection with the purification cabinet (1901).

Images